Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".

IM 7.0.6 is a bit old. Perhaps an upgrade will help. Can you provide an example JPG input and your output. We can then test own more current versions of Imagemagick. Have you tried convert a single jpg to tiff using magick rather than magick mogrify?

Imagemagick uses many different delegate libraries to convert images. Some formats it does internally others it makes use of standard libraries. That is the case for jpg and for tif and for png. It handles bmp internally, I believe.